internal/rosa: zlib artifact

Dependency of llvm build scripts.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/zlib.go

@@ -0,0 +1,25 @@
+package rosa
+
+import "hakurei.app/internal/pkg"
+
+// NewZlib returns a new [pkg.Artifact] containing an installation of zlib.
+func (t Toolchain) NewZlib() pkg.Artifact {
+	const (
+		version  = "1.3.1"
+		checksum = "E-eIpNzE8oJ5DsqH4UuA_0GDKuQF5csqI8ooDx2w7Vx-woJ2mb-YtSbEyIMN44mH"
+	)
+	return t.New("zlib-"+version, []pkg.Artifact{
+		t.NewMake(),
+	}, nil, nil, `
+cd "$(mktemp -d)"
+CFLAGS="${CFLAGS} -fPIC" /usr/src/zlib/configure \
+	--prefix /system
+make "-j$(nproc)" test
+make DESTDIR=/work install
+`, pkg.Path(AbsUsrSrc.Append("zlib"), true,
+		pkg.NewHTTPGetTar(
+			nil, "https://zlib.net/zlib-"+version+".tar.gz",
+			mustDecode(checksum),
+			pkg.TarGzip,
+		)))
+}